I just finished 3 years in Riyadh. It is a stressful place. Driving in traffic there is the most consistently dangerous thing I have ever done, and I have driven in many undeveloped countries. Working under Saudi management is not easy. In my company, any time any simple normal thing is to be expected to be done, you can be sure it will be messed up.
To give you an idea, please let me indulge in a short rant to illustrate. The plane tickets from the USA my company booked had me arriving in Atlanta at 3pm, and departing JFK at 6pm to Riyadh, with no connection from Atlanta to JFK booked. Although my arrival time in Riyadh was known since they booked my ticket themselves, there was no one waiting to pick me up at the airport at 1am. When I called for pickup and the driver finally arrived, I asked to be taken to the accommodation called for in my contract, only to find out there was nothing arraigned, not even a hotel room. I got my own hotel room, and eventually the company moved me into an apartment. But instead of a flat in the diplomatic quarter promised in my contract, they attempted to put me in a building with no real security, populated by Yemenis, Bangladeshis, etc. I had the only white face in sight, and felt I could expect Al Qaeda to kick in my door at any time. I had to print out a security warning from my embassy before I could get permission for better digs. And then, of course, I had to find my own housing - not easy when all the decent compounds in Riyadh have a waiting list of over a year.
I hope you will be flying with other western pilots, because a good percentage of the Saudi pilots were hired because of their family connections (wasta) instead of for their ability as pilots. A few of the Saudis I flew with grew into pretty good flight crew members, but more than a few were downright dangerous. I was routinely dispatched with copilots who still had wet ink on their commercial pilot licenses, and who had no business in anything bigger than a Cessna 172 (if even).
There is an unwritten but pervasive rule where I worked - Saudis are always right. To go against this rule is to get pushed out of the company. I recall a time when I was called in to run some maintenance checks, because a Saudi captain had squawked 3 different aircraft for the same problem, on the same day. It turned out he didn't know how to run the preflight checklist properly, and squawked what were normal engine indications. I then had to fly a test flight on 3 aircraft to clear the squawks. I don't know how many thousands of dollars flying around for no reason like this cost, but it was more than a few. The same captain hot-started 2 engines in a month. Later, I sat with Ops and maintenance personnel and explained what happened, and suggested that the captain in question should be advised to consult with maintenance about any perceived problems before putting pen to paper and grounding aircraft. One Saudi captain present at this discussion bemoaned the fact that anyone was listening to me, and said in Arabic that is was simple - no matter what the validity of what I was saying, no one should listen to me, and should instead support the other captain because he was a Saudi.
Other problems I have seen or been told of by trusted copilots who were present were Saudis completely and obliviously mis-programming the FMS, loading approaches for the wrong airport, exceeding engine limitations, proceeding 200 feet below VOR minimums in the soup and then flying off in some random direction on the missed, flying right into severe weather when a slight course change could have avoided the buildup (resulting in bouncing a passenger off the ceiling and knocking him unconscious), inadvertanly and repeatedly turning on the autopilot when I have called for the yaw damper, etc.
They only good thing about working in Riyadh is the paycheck, and if it is not substantially more than what you might earn elsewhere, I would advise you to look for another option.